117182278921 has 2 divisors, whose sum is σ = 117182278922. Its totient is φ = 117182278920.

The previous prime is 117182278901. The next prime is 117182278933. The reversal of 117182278921 is 129872281711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98807120896 + 18375158025 = 314336^2 + 135555^2 .

It is a cyclic number.

It is not a de Polignac number, because 117182278921 - 2⁷ = 117182278793 is a prime.

It is not a weakly prime, because it can be changed into another prime (117182278901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58591139460 + 58591139461.

It is an arithmetic number, because the mean of its divisors is an integer number (58591139461).

Almost surely, 2^117182278921 is an apocalyptic number.

It is an amenable number.

117182278921 is a deficient number, since it is larger than the sum of its proper divisors (1).

117182278921 is an equidigital number, since it uses as much as digits as its factorization.

117182278921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 49.

The spelling of 117182278921 in words is "one hundred seventeen billion, one hundred eighty-two million, two hundred seventy-eight thousand, nine hundred twenty-one".